This clinical trial is focused on studying a condition known as High-Risk Acute Graft Versus Host Disease (HR-aGvHD). This condition can occur after a patient receives a stem cell transplant, where the donated cells attack the recipient’s body. The study is testing a new treatment called CYP-001, which is made from special cells known as allogeneic mesenchymoangioblast-derived mesenchymal stem cells. These cells are given to patients through an infusion, which means they are delivered directly into the bloodstream. The study will compare the effects of this new treatment combined with standard medications called corticosteroids against the effects of corticosteroids alone.
The purpose of the study is to see how well the new treatment works and how safe it is for patients with HR-aGvHD. Participants in the study will be randomly assigned to receive either the new treatment with corticosteroids or a placebo with corticosteroids. The study will monitor participants over a period of time to see how their condition responds to the treatment. The main goal is to observe the overall response of the disease by Day 28, which means checking if the symptoms have improved or resolved.
Throughout the study, researchers will also look at other important factors, such as how long the response lasts, overall survival, and any side effects that may occur. The study aims to provide valuable information that could lead to better treatment options for people with HR-aGvHD in the future.



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